SproutSmart
SproutSmart™ Intelligent Garden Sowing

Kalura Cos

Lettuce
Zone 13b Save Garden

Planting Schedule

Add Kalura Cos to your garden to build a schedule and get reminders.
Botanical illustration of Kalura Cos
60d to harvest

Crisp as fresh-cut glass, Kalura Cos forms tall, elegant heads with a tender, sweet snap and a clean, lightly buttery flavor. The leaves are deep green and beautifully elongated, with a sturdy midrib that holds its shape for satisfying bite and effortless serving. Ideal for gardeners who want a reliable Romaine—excellent for fresh salads and also for grilling, braising, and vibrant sauces where its texture stays pleasantly crisp.

Crop Dates

Growing note: In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 30th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity60
Sun RequirementsFull SunFull sun
Growth HabitRosette
Support NeededNone
Planting DepthSurface
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)32
Harden Off (days)6

Today's Conditions

Outdoor planting for Kalura Cos in Zone 13b typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Kalura Cos.

Garden Alerts

In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).

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Frequently Asked Questions

What pest or disease most often affects Lactuca sativa (kalura cos), and how do I manage it?
Look for aphids and slugs on young leaves; aphids cluster on tender growth and slugs chew holes, especially in humid weather. Spray an insecticidal soap for aphids and hand-remove slugs at dusk, then reduce hiding spots by keeping the bed weed-free and lightly mulched but not soggy. Also watch for downy mildew/botrytis (gray mold): avoid wetting the leaves, water at the soil line, and space plants to improve airflow.
How often should I water kalura cos during its main growing phase?
During the 40–60 day main leaf-growth period, keep the soil consistently moist but not waterlogged—aim for about 1 inch (2.5 cm) per week total, adjusted for heat and soil type. Water deeply 2–3 times per week rather than frequent light sprinkling, and stop after heads are fully formed to reduce rot risk. If leaves wilt in the afternoon, increase watering frequency slightly while still maintaining good drainage.
Botanical illustration of Kalura Cos

Crisp as fresh-cut glass, Kalura Cos forms tall, elegant heads with a tender, sweet snap and a clean, lightly buttery flavor. The leaves are deep green and beautifully elongated, with a sturdy midrib that holds its shape for satisfying bite and effortless serving. Ideal for gardeners who want a reliable Romaine—excellent for fresh salads and also for grilling, braising, and vibrant sauces where its texture stays pleasantly crisp.

Today's Conditions

Outdoor planting for Kalura Cos in Zone 13b typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Kalura Cos.

Garden Alerts

In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

For best crispness, keep soil consistently moist and avoid heat spikes—shade cloth can help if nights stay warm.